Sticky brakes after booster replacement

[newbutlearning]

I just replaced the brake booster on my 96 Tahoe 4D Monday night. Wednesday morning, on my way to work, I noticed whenever I pressed ******* the brakes, it made a whistling sound. The brakes also didn't let up after letting go of the pedal. It took a few seconds for them to finally let go. The sound the pedal made was between a whistle and a squeegee on a window. Any suggestions?

 

[SunlitComet]

loose booster vacuum line or a defective internal diaphragm valve.

 

[newbutlearning]

loose booster vacuum line or a defective internal diaphragm valve.

I'll check the vacuum line, but I'm afraid it's the diaphragm valve. Thanks for pointing me in the right direction.

 

[newbutlearning]

loose booster vacuum line or a defective internal diaphragm valve.

It was apparently the internal diaphragm valve. I removed the booster and swapped it out. Brakes work great now. Thanks for your help.

 

[qukon 95]

I no this is a old thread i have this exact problem with this rebuilt
brake booster. the bad thing is that i painted first i hope they don't
give me s--t about it.
The next one will be put on & tested first.

 

[qukon 95]

i returned it and got another one and it's a good one.
and i'm not painting this one.

 

[gGM Fan]

Dont forget to adjust your rear drums. I know they are supposed to be self adjust but my 98 3/4 ton needed to be adjusted at least twice a year.